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Physics Letters B.




8 pp.


We report results on the total and elastic cross sections in proton-proton collisions at √s = 200 GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section was measured in the squared four-momentum transfer range 0.045 ≤ −t ≤ 0.135 GeV². The value of the exponential slope parameter B of the elastic differential cross section dσ/dt ∼ e−Bt in the measured −t range was found to be B = 14.32 ± 0.09 (stat.)+0.13−0.28(syst.) GeV⁻². The total cross section σtot, obtained from extrapolation of the dσ/dt to the optical point at −t = 0, is σtot = 54.67 ± 0.21(stat.)+1.28−1.38(syst.) mb. We also present the values of the elastic cross section σel = 10.85±0.03 (stat.)+0.49−0.41 (syst.) mb, the elastic cross section integrated within the STAR t-range σeldet = 4.05 ± 0.01(stat.)−0.17+0.18(syst.) mb, and the inelastic cross section σinel= 43.82 ± 0.21(stat.)−1.44+1.37(syst.) mb. The results are compared with the world data.


© 2020 The Authors.

This is an open access article under the CC BY 4.0 license (Attribution 4.0 International).

Original Publication Citation

Adam, J., Adamczyk, L., Adams, J. R., Bueltmann, S., Zhu, Z., Zyzak, M., Et. al., Star Collaboration (2020). Results on total and elastic cross sections in proton–proton collisions at √s = 200 GeV. Physics Letters B, 808, 8 pp., Article 135663.

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